In a large mixing bowl, combine flour and salt.
Gradually add water and knead into a soft dough for momos.
Add oil and knead again for 2–3 minutes.
Cover with a damp cloth and let it rest for 30 minutes.
In a bowl, combine chopped cabbage, carrots, capsicum, and spring onions to make the filling.
Add minced garlic and ginger.
Mix in soy sauce, vinegar, pepper, and salt.
Optional: Lightly sauté the filling in a pan for 2 minutes and let cool.
Divide dough into lemon-sized balls.
Roll each into a thin disc (3 inches diameter).
Place 1 spoon of filling in the center.
Fold and pleat to seal the edges tightly. Repeat with remaining dough.
Grease a steamer plate or line with cabbage leaves.
Place momos on the plate without touching each other.
Steam momos for 10–12 minutes until translucent and non-sticky.
Serve hot with spicy momos chutney or Schezwan sauce.